Retractable brush for suction cleaners



E. D.BO|$SELIER RETRACTABLE BRUSH FOR SUCTION CLEANERS Dec. 9, 1947.

Filed July 3, 1944 2 Sheets-Sheet l lary/j @z S56/:n

VM/m6 Dec 9, 1947 Y. E. D. Bol-ssELIER 2,432,086

RETRACTABLE BRUSH FOR SUCTION CIANERS Filed July 3, 1944 2 Sheets-Sheet 2 g v MZ 5 4142 V 'III' Patented Dec. 9, 1947 ZABZS@ FAYEN' @ENCE RETRACTABLE BRUSH FOB SUCTION CLEANERS Earl D. 'Boisselien Glen Ellyn, lill., assigner to Sears, Roebuck and Co., a corporation of New York Application `uly 3, 1944, Serial No. 543,317

1 Claim.

This invention relates to a retractable brush for a suction cleaner.

The usual motor brush suction cleaner is equipped with a rotary motor brush and a nozzle normally twisted 90. The mounting of the belt on the spindle is a task requiring considerable strength, and for this reason it is desirable to provide mechanical means for stretching the belt into place. In the present invention this is made possible by mounting the brush within the nozzle chamber in such manner as to permit its ready retraction by swinging it out of the chamber and towards the rear.

The invention is illustrated in the present case in combination with means for adjusting the brush with reference to the cleaning surface.

The invention is illustrated in the drawings in which Figure 1 is a plan view of the front portion of the cleaner looking upward; Figure 2 is a sectional elevation thereof taken along the line 2 2 in Figure l; Figure 3 is a detailed View of one of the brush mounting brackets; Figure 4 is a view corresponding to Figure 2 but with the brush in position for attachment of the belt and with the cleaner turned upside down; and Figure 5 is a detailed view taken along the line 5 5 in Figure 2, with the position of the cleaner inverted, illustrating the operation of the gauge.

The invention relates to any conventional type of motor brush cleaner having a casing lil, a motor Il, a fan l2, a belt-driving spindle i3, a power belt lll, and a suction opening l5 leading to a nozzle chamber It. A brush 2i! is mounted in the motor chamber and may be of any conven tional type, but the present invention is primarily applicable to one having a series of bristles 2l. The bearings 22 for the brush roller are each mounted in a bracket 23. This bracket is pivotally mounted at 24 in the end wall 25 of the nozzle chamber. It is normally urged into engagement with the cam 26 by any suitable means such as a spring 2l. When it is in operating position, the cam is engaged by the cam follower surface 28 on the lower side of the bracket. The pivot for the bracket is near the bottom of the nozzle chamber and somewhat in advance of the rear wall 29 thereof. As a result, the brush may be lifted into the position shown in Figure 4 in which the upper edge Sil of the bracket engages the wall 29. At this point the bracket has passed 5 collar 3 i.

30 29 or the nozzle chamber.

the dead center of the spring so that the brush is held in the lower position shown in Figure 4.

In this position the belt may readily be mounted on the spindle i3 and is held thereon by the It will be observed that in this position the brush is considerably closer to the spindle than in its operating position, so that the belt may readily be placed in position. The brush is then retracted to operating position without effort on the part of the operator.

a lever arm l2 provided at its end with the gear teeth i3 which engage the worm lle carried by the adjusting post 45. This post is secured to the casing and is provided at its top with the cap 66 having a rib el adapted for easy grasping.

Turning of the post 5 raises or lowers, depending upon the direction of turning, the arm 42, and, therefore, rotates the bar iii Rotation of the bar, which is of course rigid, raises or lowers the cams 26, thereby synchronously adjusting both ends of the brush by movement of the brackets 23.

The appropriate position of the brush may be indicated by the gauge 5t which is pivotally mounted in a bracket 52 secured to the rear wall In its retracted position, as shown in Figure 1, the gauge is immediately outside of the air conduit and does not interfere with operation of the device. When swung into forward position, as shown in Figure 5, the front end 5ft of the bracket abuts on the .front lip 55 of the nozzle, thereby accurately positioning the registration portion 56 of the gauge. This portion is preferably cut away in a circular segment so positioned that the bottom of the segment indicates precisely the point where the end of the It is preferred to employ the invention in combination with a belt guard 6G of any suitable type. The foregoing detailed description has been given for clearness of understanding only, and

no unnecessary limitations should be understood therefrom.

What I claim as new, and desire to secure by Letters Patent, is:

In a suction cleaner having a nozzle chamber, a rotatable brush therein, a pivotally mounted brush-carrying bracket at each end of the brush and within the nozzle chamber, a bracket pivot on each bracket normally below and to one side of the brush with both bracket pivots being substantially horizontally aligned, means for synchronously moving both brackets to a predetermined setting around their pivots, a spring havbracket pivot when the` brush is in the nozzle chamber, and at a-point located at an opposite 15 2,184,446

4 side of said line when the brackets are pivoted to a position outside said chamber.

EARL D. BOISSELIER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 10 Number Name Date 2,099,378 Smelle NOV. 16, 1937 2,092,581 KttO Sept. 7, 1937 1,324,195 Hoover Dec. 9, 1919 2,080,510 Sellers May 18, 1937 Snyder Dec. 26, 1939 

